US10842774B2 - Inhibited expression of PD-L1 and enhanced expression of PD-1 - Google Patents
Inhibited expression of PD-L1 and enhanced expression of PD-1 Download PDFInfo
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- US10842774B2 US10842774B2 US16/653,308 US201916653308A US10842774B2 US 10842774 B2 US10842774 B2 US 10842774B2 US 201916653308 A US201916653308 A US 201916653308A US 10842774 B2 US10842774 B2 US 10842774B2
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Definitions
- the present disclosure relates to the use of Type A polymers, including A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins, and methods for promoting decreased expression of a CD274 gene or a PD-L1 protein and enhanced expression of a PDCD1 gene or a PD-1 protein in a subject.
- Dysregulated cellular function underlies many pathological conditions. Identification of molecular effectors of proper cell function along with methods of preventing or reversing cell dysfunction are required for promoting or maintaining proper or enhanced cellular function. Dysregulated gene expression is implicated in a variety of diseases such as cancer, diabetes, obesity, cardiovascular diseases and neurodegeneration. Discerning which molecular targets are most directly associated with a disease or condition is paramount to treating or preventing the disease and condition.
- the programmed death 1 (PD-1) receptor and PD-1 ligands 1 and 2 play integral roles in immune regulation.
- PD-1 is activated by PD-L1 and PD-L2 expressed by stromal cells, tumor cells, or both, initiating T-cell death and localized immune suppression, potentially providing an immune-tolerant environment for tumor development and growth.
- inhibition of this interaction can enhance local T-cell responses and mediate antitumor activity in nonclinical animal models.
- treatment with antibodies that block the PD-1-PD-L1 interaction have been reported to produce objective response rates of 7% to 38% in patients with advanced or metastatic solid tumors, with tolerable safety profiles.
- PD-L1 The programmed death 1 (PD-1) receptor and programmed death-ligand 1 (PD-L1) play integral roles in immune regulation.
- PD-L1 also called B7-H1 or CD274
- CD274 is a 290 amino acid protein receptor ligand encoded by the CD274 gene and is expressed widely on both lymphoid and non-lymphoid tissues such as CD4 and CD8 T-cells, macrophage lineage cells, peripheral tissues as well as on tumor cells, and virally-infected cells (Dong et al. 1999, Nature Med.).
- PD-L1 binds to receptors PD-1 and B7-1 which belong to the CD28/CTLA-4 (cytotoxic T lymphocyte antigen)/ICOS (inducible co-stimulator) family of T-cell co-inhibitory receptors and attenuates the immune response by inhibiting T-cell activation.
- PD-L1 binding to PD-1 or B7-1 results in decreased T-cell proliferation and cytokine secretion, compromising humoral and cellular immune responses in diseases such as cancer, and viral infection.
- PD-L1 The expression of PD-L1 on tumor cells and virally-infected cells is exploited by tumors and chronic viral infections to evade immune response.
- PD-L1 is expressed on a wide variety of tumors and studies on animal models have shown that PD-L1 on tumors inhibits T-cell activation and lysis of tumor cells and may lead to increased death of tumor-specific T-cells.
- chronic viral infections PD-L1 expressed on virally-infected cells binds to PD-1 on virus-specific T-cells and these T-cells become “exhausted” with loss of effector functions and proliferative capacity.
- the PD-1-PD-L1 system also plays an important role in induced T-regulatory cell development and in sustaining T regulatory cell function. Accordingly, as PD-L1 plays an important role in tumor immunity and infectious immunity, a composition that decreases expression of a CD274 gene or a PD-L1 protein is an ideal target for immunotherapy.
- PD-1 is an immunosuppressive receptor belonging to an immunoglobulin family and is encoded by the PDCD1 gene.
- PD-1 is a molecule having a function of suppressing the immune activation signals of T-cells activated by stimulation through an antigen receptor.
- autoimmune diseases such as autoimmune dilated cardiomyopathy, lupus-like syndrome, autoimmune encephalomyelitis, systemic lupus erythematosus, graft-versus-host disease, type I diabetes mellitus, and rheumatoid arthritis.
- autoimmune diseases such as autoimmune dilated cardiomyopathy, lupus-like syndrome, autoimmune encephalomyelitis, systemic lupus erythematosus, graft-versus-host disease, type I diabetes mellitus, and rheumatoid arthritis.
- a composition that enhances expression of a PDCD1 gene or a PD-1 protein is an ideal target for immunotherapy.
- compositions and methods of decreasing expression of a CD274 gene or a PD-L1 protein while increasing expression of a PDCD1 gene or a PD-1 protein in a subject there exists a need for compositions and methods of decreasing expression of a CD274 gene or a PD-L1 protein while increasing expression of a PDCD1 gene or a PD-1 protein in a subject.
- One object is to provide a method for altering levels of a CD274 gene product(s) or a PD-L1 protein and a PDCD1 gene expression product(s) or a PD-1 protein. Such expression can be used restore abnormal expression of these expression products in a subject.
- This object is achieved in the present disclosure that provides processes for decreasing expression of a CD274 gene or a PD-L1 protein while increasing expression of a PDCD1 gene or a PD-1 protein in a subject.
- the processes include administering to the subject a composition comprising at least 0.5% Type-A polymers by weight.
- the Type-A polymers include A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins.
- the A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins include cinnamtannin D-1 and/or cinnamtannin B-1.
- Further processes include decreasing expression of a CD274 gene or a PD-L1 protein while increasing expression of a PDCD1 gene or a PD-1 protein in said subject by the step of administering.
- FIG. 1 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with isolated doubly linked type-A polymers from an extract of cinnamon at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 25 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 2 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with cinnamtannin B-1 at a concentration of at 0 ⁇ g/ml, 2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 20 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 3 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with cinnamtannin D-1 at a concentration of at 0 ⁇ g/ml, 2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 20 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 4 graphically depicts the effects on LPS-induced overexpression of PDCD-1 as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with LPS at 10 ⁇ g/ml and isolated doubly linked type-A polymers from an extract of cinnamon at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 5 graphically depicts the effects on LPS-induced overexpression of PDCD-1 as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with LPS at 10 ⁇ g/ml and cinnamtannin D-1 at a concentration of at 0 ⁇ g/ml, 2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 25 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 6 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with garlic acid at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 7 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with rutin (the glycoside combining the flavonol quercetin and the disaccharide rutinose) at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- rutin the glycoside combining the flavonol quercetin and the disaccharide rutinose
- FIG. 8 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with quercetin at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 9 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with olive leaf extract at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 10 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with rosemary extract at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 11 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with a black chokeberry extract from the Aronia (CellBerry®) at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 100 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 12 graphically depicts the effects on PDCD-1 expression as quantitative densitometry results of immunofluorescence studies for human macrophage-like THP-1 cells treated with curcumin extract at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 13 graphically depicts the effects on PD-L1 expression as quantitative densitometry results of immunofluorescence studies for rat C6 glioma cells treated with cinnamtannin D1 at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 25 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 14 graphically depicts the effects on PD-L1 expression as quantitative densitometry results of immunofluorescence studies for rat C6 glioma cells treated with cinnamtannin B1 at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 25 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 15 graphically depicts the effects on TNF- ⁇ -induced overexpression of PD-L1 as quantitative densitometry results of immunofluorescence studies for rat C6 glioma cells treated with TNF- ⁇ at 10 ng/ml and cinnamtannin D1 at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate;
- FIG. 16 graphically depicts the effects on LPS-induced overexpression of PD-L1 as quantitative densitometry results of immunofluorescence studies for rat C6 glioma cells treated with LPS at 10 ⁇ g/ml and cinnamtannin D1 at a concentration of at 0 ⁇ g/ml, 10 ⁇ g/ml, or 50 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate; and
- FIG. 17 graphically depicts the effects on PD-L1 expression as quantitative densitometry results of immunofluorescence studies for rat C6 glioma cells treated with a purified type-A polymer material with at least 3% by weight type-A polymers tested at a concentration of at 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml for 24 hours at 37° C. where results are expressed as the mean ⁇ SD of five to ten random fields with approximately similar density of cells in each field in each plate.
- compositions that decreases expression of a CD274 gene or a PD-L1 protein and increases expression of a PDCD1 gene or a PD-1 protein in a subject.
- the subject is a cell, for example, a tumor cell.
- the compositions and processes of various embodiments decrease expression of a CD274 gene or a PD-L1 protein and increase expression of a PDCD1 gene or a PD-1 protein in a subject and are useful for treatment of a tumor with reduced or even without cardiac side effects.
- the composition includes Type-A polymers including A-Type singly or doubly linked procyanidin oligomers of the catechins or epicatechins that have utility for altering the expression level of a CD274 gene expression product(s) or a PD-L1 protein, a PDCD1 gene expression product(s) or a PD-1 protein in a subject, including a cell.
- Type-A polymers including A-Type singly or doubly linked procyanidin oligomers of the catechins or epicatechins that have utility for altering the expression level of a CD274 gene expression product(s) or a PD-L1 protein, a PDCD1 gene expression product(s) or a PD-1 protein in a subject, including a cell.
- Processes are provided for inhibiting expression of a CD274 gene and/or a PD-L1 protein while enhancing expression of a PDCD1 gene and/or a PD-1 protein in a subject, optionally a cell.
- processes are provided for inhibiting expression of a CD274 gene and/or a PD-L1 protein while enhancing expression of a PDCD1 gene and/or a PD-1 protein in a cell of a subject.
- a “subject” is defined as an organism (such as a human, non-human primate, equine, bovine, murine, or other mammal), or a cell.
- Illustrative examples of cells include tumor cells, such as C6 glioma cells and human macrophage-like THP-1 cells.
- a subject in need is defined as a subject that has increased cellular levels of a CD274 gene and/or a PD-L1 protein relative to normal cellular levels and/or decreased cellular levels of PDCD1 gene and/or a PD-1 protein relative to normal cellular levels, or that desires to have decreased cellular levels of a CD274 gene and/or a PD-L1 protein relative to normal cellular levels or the subject's own cellular baseline levels and/or increased levels of PDCD1 gene and/or a PD-1 protein relative to normal cellular levels or the subject's own cellular baseline levels.
- the composition may be used to simultaneously inhibit expression of a CD274 gene and/or a PD-L1 protein while enhancing expression of a PDCD1 gene and/or a PD-1 protein.
- Such administration may be used to ameliorate, prevent, or modulate cardiac events in the subject.
- inhibiting is defined as a decrease in expression, activity, or effect relative to a control related to the presence of an effector such as a Type-A polymer or a component thereof, such as A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins, as will be described in greater detail below.
- Illustrative examples of “inhibiting” are decreases in the cellular expression level or rate of one or more genes that encode PD-L1 such as CD274, or decreases in levels of a PD-L1 protein.
- enhancing is defined as an increase in expression, activity, or effect relative to a control related to the presence of an effector such as a Type-A polymer or a component thereof, such as A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins.
- an effector such as a Type-A polymer or a component thereof, such as A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins.
- Illustrative examples of “enhanced” are increases in the cellular expression level or rate of one or more genes that encode a PD-1 such as PDCD1, or increases in cellular levels of a PD-1 protein.
- Active ingredient refers a component present in the composition that renders, directly or indirectly, the intended effect.
- One particular example is a polyphenol type-A polymer, with more particular examples being singly linked type-A polymers and/or doubly linked type-A polymers.
- Other particular examples include cinnamtannin D-1 and/or cinnamtannin B-1.
- the term “active ingredient” excludes singly linked Type-A polymers.
- Polyphenol refers to a group of chemical substances found in plants, characterized by the presence of more than one phenol group per molecule.
- polyphenols include, but are not limited to, Type-A polymers and oligomers or phenolic materials. Natural sources of polyphenols include green tea, white tea, red wine, dark chocolate, olive oil, and other fruits, vegetables, and plants including cinnamon.
- the composition includes at least 0.5% Type-A polymers by dry weight.
- Type-A polymers may include A-Type singly and/or doubly linked procyanidin oligomers of the catechins and/or epicatechins.
- Such A-Type singly linked procyanidin oligomers of the catechins and/or epicatechins can include A-Type singly linked procyanidin dimers, A-Type singly linked procyanidin trimers, A-Type singly linked procyanidin trimers, A-Type singly linked procyanidin tetramers, and/or a mixture of A-Type singly linked procyanidin oligomers.
- Such A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins can include A-Type doubly linked procyanidin dimers, A-Type doubly linked procyanidin trimers, A-Type doubly linked procyanidin trimers, A-Type doubly linked procyanidin tetramers, and/or a mixture of A-Type doubly linked procyanidin oligomers.
- the A-Type doubly linked procyanidin oligomers of the catechins and/or epicatechins include cinnamtannin D-1 and/or cinnamtannin B-1.
- Type-A polymers as used herein are a bioactive type of naturally available polymers. They are identified by their protonated molecular masses as A-type singly or doubly linked procyanidin oligomers of the catechins and/or epicatechins. The polymers are composed of monomeric units of catechins and/or epicatechins with a molecular mass of 288 Da.
- A-type doubly linked procyanidin oligomers may have masses ranging from 576 to 1728 Da and may include dimers, trimers, tetramers, and a mixture of oligomers, respectively.
- two separate doubly linked Type A trimers and a doubly linked Type A tetramer have molecular masses of 864 and 1152 Da, respectively.
- the trimer and tetramer oligomers include terminal (T), middle (M) and base (B) units, with the M unit of the two trimers consisting of a single catechin/epicatechin and the M unit of the tetramer consisting of two catechins/epicatechins.
- Doubly linked procyanidin type-A oligomers of the catechins and/or epicatechins contain C4 ⁇ C8 carbon and C2 ⁇ O7 ether bonds between the T and M units of the oligomers, and have the structure:
- Type-A polymers can include A-type singly or doubly linked procyanidin dimers of catechins and/or epicatechins, A-type singly or doubly linked procyanidin trimers of catechins and/or epicatechins, A-Type singly or doubly linked procyanidin tetramers of catechins and/or epicatechins, and/or a mixture of A-Type singly or doubly linked procyanidin oligomers of catechins and/or epicatechins.
- Type-A polymers can include A-Type doubly linked procyanidin dimers of catechins and/or epicatechins, A-type doubly linked procyanidin trimers of catechins and/or epicatechins, A-Type doubly linked procyanidin tetramers of catechins and/or epicatechins, and/or a mixture of A-Type doubly linked procyanidin oligomers of catechins and/or epicatechins.
- the Type-A polymers can include cinnamtannin D-1 and/or cinnamtannin B-1.
- A-Type singly linked procyanidin oligomers of the catechins and/or epicatechins are excluded from a composition.
- the Type-A polymers can include cinnamtannin D1 ((2R,3R,4S,8S,14R, 15R)-2,8-bis(3,4-dihydroxyphenyl)-4-[(2R,3S)-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-1-benzopyran-8-yl]-3,4-dihydro-2H,8H,14H-8,14-methano-1,7,9-trioxabenzo[6,7]cycloocta[1,2-a]naphthalene-3,5,11,13,15-pentol) and/or cinnamtannin B1.
- Cinnamtannin D1 has the following structure:
- Cinnamtannin B1 has the following structure:
- the amount of active ingredient (e.g., cinnamtannin D1 or cinnamtannin B1) is in the range of 0.5% to 25%, optionally 1% to 10% by weight.
- the amount of active ingredient is greater than or equal to 0.5%, greater than or equal to 1%, greater than or equal to 2%, greater than or equal to 3%, greater than or equal to 4%, greater than or equal to 5%, greater than or equal to 10% by weight.
- an active ingredient is or is a part of a broader composition.
- the active ingredient may be present in the broader composition at 0.5%-100% by weight, 1%-50% by weight, 1%-10% by weight, 20%-50% by weight, 30%-40% by weight, or any value or range between 0.5% and 100% of the dry weight of the broader composition.
- the amount of polyphenol Type-A polymers optionally doubly linked type-A polymers or the like is in the range of 0.5% to 25%, optionally 1% to 10% by weight.
- the amount of polyphenol Type-A polymers is greater than or equal to 0.5%, greater than or equal to 1%, greater than or equal to 2%, greater than or equal to 3%, greater than or equal to 4%, greater than or equal to 5%, or greater than or equal to 10% by weight.
- the amount of doubly-linked polyphenol Type-A polymers is in the range of 0.5% to 25%, optionally 1% to 10% by weight.
- the amount of doubly-linked polyphenol Type-A polymers may be greater than or equal to 0.5%, greater than or equal to 1%, greater than or equal to 2%, greater than or equal to 3%, greater than or equal to 4%, greater than or equal to 5%, or greater than or equal to 10% by weight.
- a Type-A polymer is or is a part of a dietary supplement composition.
- a Type-A polymer is optionally present in a dietary supplement composition at 0.5%-100% by weight, optionally 1%-50% by weight, optionally 1%-10% by weight, optionally 20%-50% by weight, optionally 30%-40% by weight, or any value or range between 0.5% and 100% of the dry weight of the dietary supplement composition.
- Type-A polymers such as A-Type singly and/or doubly linked procyanidin oligomers of the catechins and/or epicatechins may be chemically synthesized or obtained from one or more natural sources.
- One or more of any process for isolating chemical material from a plant may be used to isolate the Type-A polymers such as A-Type singly and/or doubly linked procyanidin oligomers of the catechins and/or epicatechins.
- One exemplary source of type-A polymers is cinnamon. Cinnamon may be obtained from various resources. Illustratively, cinnamon is obtained from bark. Cinnamon bark may be obtained from various parts of the world, including China, Sri Lanka, Indonesia and others.
- the type-A polymers are optionally obtained by carefully tailored extraction procedures from cinnamon bark.
- An extract of cinnamon is optionally derived from any Cinnamonum species.
- an extract of cinnamon is derived from the bark of Cinnamonum aromaticum, Cinnamonum verum , or Cinnamomum burmannii .
- an extract of cinnamon is derived from the bark of the Cinnamomum zeylanicum tree of the genus Lauraceae . This tree is native to eastern and southeastern Asia. Other sources of cinnamon may also be used in the methods and materials disclosed herein.
- Cinnamon bark may be used in the form of raw bark, sliced, or minced bark, or pulverized bark for the preparation of the therapeutic materials, and pulverized cinnamon bark is used in particular instances.
- Extracts may be prepared by various methods carefully tailored to produce the required concentration or amount of type-A polymers.
- the extracts are optionally water soluble.
- the extracts are optionally water soluble water extracts, water soluble alcohol extracts, or water soluble extracts of other operative extraction processes.
- the extraction process is directly linked to the final composition of the resulting extract.
- a product formed by one process does not necessarily equate to an extract formed by a different process, often differing by a single extraction parameter.
- the processes described herein represent exemplary methods to produce extracts with the desired level of the active agent—Type-A polyphenols, particularly doubly linked Type-A polymers.
- Extraction parameters such as water quality, heating temperature, drying temperature, heating time, drying time, and filtering processes all contribute to the quality and efficiency of the processes.
- Water quality directly affects the concentration of active agents. Poor quality water may cause type-A polymers to become decomposed and oxidized during the extraction process. This often results in cinnamon extract powder being reddish in color and the percent concentration of type-A polymers being low.
- Heating time determines the ratio of various polymers being extracted. Heating time also affects the thickness of extraction mixture which then has a direct impact on the downstream filtering process.
- the temperature of the extraction also affects the level of active type-A polymers. In some aspects, the extraction temperature is between 50° C. and 100° C. Optionally, the extractions temperature is between 50° C. and 95° C.
- the temperature is between 50° C. and 90° C.
- the extraction temperature is between 50° C. and 90° C.
- Drying temperature may vary from 75° C. to 120° C. depending on what other extraction parameters are also used.
- the amount of solvent used is generally from 2 to 100 times the raw extract material on a weight basis.
- the extraction is performed with 1000 ml of water (1 g/ml is weight of water—i.e. 20 times volume).
- Extractions are optionally performed by heating the raw material in an extraction solvent in excess of 10 minutes, optionally, in excess of 1 hour, optionally between 1 and 3 hours with any subdivision also operable.
- Extraction solvents are optionally aqueous or organic. Distilled water or alcohols such as ethanol are optionally used alone or in combination as extraction solvents. The extracts obtained are optionally water soluble.
- liquid extracts are further processed by column chromatography to further isolate the actives, optionally by molecular sieve column appropriately sized to isolate the active.
- cinnamon extracts that contain the requisite amount of type-A polymers are found in U.S. Pat. No. 6,200,569, which is hereby incorporated by reference in its entirety, and therein describing the product sold as CINNULIN PF.
- doubly linked procyanidin type-A polymers (3% by weight) in a dried extract of bark from C. burmanni may be prepared as described (Anderson et al., J. Agric. Food Chem. 2004; 52:65-70), or provided by IN Ingredients Inc. (formerly Integrity Nutraceuticals, Columbia, Tenn., USA) as CINNULIN PF.
- 50 g clean cinnamon bark is ground into small particles or powder.
- the powder or particles are mixed with 1000 ml distilled water in a suitable flask.
- the mixture is let stand at room temperature for about 0.5 hour.
- an amount of buffer is optionally added to maintain the pH of the extraction solvent.
- Additional water may be added is in the range of 1:20 to 1:2000. Too little water may render the mixture too thick for extraction. However, too much water increases drying time. Then the water mixture is heated while being stirred through the use of a magnetic heat stirrer.
- the temperature and extraction time are crucial to the concentration efficiency of the bioactive polymers.
- the extraction process is optionally no longer than one hour.
- the ground bark may be heated for 15-20 minutes bringing to a boil, simmering for 20-30 minutes while stirring constantly.
- the ground bark is heated to 100° C. 15-20 minutes and then simmered for 20-30 minutes while stirring constantly.
- the boiling time is optionally controlled at about 20-25 minutes following heating.
- the mixture is cooled and stored at 4° C. overnight.
- An exemplary cinnamon extract obtained by a water extraction is sold as CINNULIN PF.
- 250 kg of Cinnamomum burmannii is ground into small particles or powder.
- the powder or particles are mixed with 2000 ml (8 ⁇ ) distilled ethanol-water in a suitable flask and the mixture is allowed to stand at ambient temperature for 0.5 hours.
- water alone is used as the extraction solvent illustratively by using a 10 ⁇ fold-water volume/weight ground cinnamon bark.
- the mixture is heated to 50° C. while being stirred through the use of a magnetic heat stirrer and circulated for 120 min. Evaporation is performed at a steam temperature of less than 100° C. with a process temperature of less than 60° C. with a TS refract meter of 45-50%.
- the liquid extract is filtered and further purified as above.
- the material is then dried to a moisture content of less than 5%.
- Type-A polyphenols are extracted from cinnamon using the following process: 5 g cinnamon and 100 ml 0.1 N acetic acid are combined and autoclaved for 15 minutes. The resultant mixture is cooled, then centrifuged and the precipitate discarded. Four volumes of ethanol/0.1 N acetic acid are added to the supernatant and the mixture is stored overnight at 4 Co. The mixture is screened through a filter. To determine the amount of bioactive polymers the mixture is introduced onto an LH-20 column and washed with 600 ml ethanol/0.1 N acetic acid. The desired fraction is then eluted with a 1:1 mixture of acetonitrile and 0.2 N acetic acid. The eluate is then concentrated and introduced onto a HPLC column at 275 nm.
- the initial extraction is performed in the absence of acid.
- 50 g clean cinnamon bark is ground into small particles or powder and mixed with 1000 ml distilled water/10% ethanol in a suitable flask. Then the water mixture is heated while being stirred through the use of a magnetic heat stirrer. The extraction process is optionally no longer than one hour.
- the ground bark in extraction solvent is heated to a boil for 15-20 minutes, and then simmered for 20-30 minutes while stirring constantly. The boiling time is typically controlled at about 20-25 minutes following heating.
- the mixture is cooled and stored at 4° C. overnight.
- alcohols other than or in addition to ethanol illustratively methanol, may be used in the extraction procedure as well. When alcohol is used in the extraction solvent is it generally present at 50% or less.
- any one of the extraction solutions (or combinations thereof) described herein is optionally filtered through a filter paper to remove any solid debris. If the solution is too thick for the filter paper, the removal of solids from the solution is optionally done with the use of centrifugation. The resulting supernatant is filtered through medium speed filter paper. The resulting solids are optionally dissolved in 200 mL distilled water, or water/ethanol for a second extraction. The liquid solution containing the solids is mixed and heated for 30 minutes at 80-90° C. and then is filtered to produce a second extraction solution.
- first and second extraction solutions are combined together and poured onto nonstick tray and allowed to dry at 80-90° C.
- Vacuum-spray dry equipment is optionally used for the drying procedure.
- the resulting dry extract powder is weighed.
- An extraction ratio is calculated as w/20 ⁇ 100% with w as the weight (g) of the dry extract powder.
- the sample and water ratio, heat time, volume of water in the second extraction may vary depending on the amount of the raw material used for extraction.
- High performance liquid chromatography is optionally employed to analyze the effect on the concentrations of the polymers by changes in heating temperature and extraction time.
- HPLC High performance liquid chromatography
- 100 mg dry cinnamon powder is dissolved with 100 ml water in a flask.
- the solution is sonicated for 30-45 minutes and filtered through 0.45 ⁇ m PTFE syringe.
- the samples are prepared and tested at different temperatures as follows: samples are extracted at 50-60° C. for one hour, Type-A polymers eluting at 17 and 21 minutes have reasonable concentrations. After increasing the temperature to 75-82° C. for 1 hour, the peaks eluting at 17 and 21 minutes are decreased by 2-3%. There are additional two relatively small peaks that seem to surface during this extraction.
- the stabilization of the Type-A polymers is analyzed.
- Various extraction periods at heating temperature of 50-100° C. are tested particularly 95-100° C.
- polymer eluting at 17 and 21 minutes presents desirable concentrations.
- the peaks eluting at 17 and 21 minutes decrease as the heating temperature increases in the first 2-3 hours.
- the peaks eluting at 17 and 21 minutes no longer change as significantly and seem to reach a plateau period.
- Cinnamon extract dry powder prepared as discussed above is tested to confirm the presence of certain amount of polyphenols such as double-linked polyphenol Type-A polymers singly-linked Type-A polymers, or other bioactive polymers through the use of HPLC.
- the Type-A polymers may include cinnamtannin D-1 and/or cinnamtannin B-1. This allows for standardization of the extract.
- the dry weight of the cinnamon extract powder can be standardized on the basis of a bioactive component, such as doubly-linked polyphenol Type-A polymers.
- the amount of polyphenol Type-A polymers or the like is optionally in the range of 0.5% to 25%, optionally 1% to 10% by weight.
- the amount of polyphenol Type-A polymers is greater than 0.5%, greater than 1%, greater than 2%, greater than 3%, greater than 4%, greater than 5%, or greater than 10% by weight.
- the amount of doubly-linked polyphenol Type-A polymers or the like is optionally in the range of 0.5% to 25%, optionally 1% to 10% by weight.
- the amount of doubly-linked polyphenol Type-A polymers is greater than 0.5%, greater than 1%, greater than 2%, greater than 3%, greater than 4%, greater than 5%, or greater than 10% by weight.
- the final concentration of Type-A polymers is often insufficient or less than 0.5%, less than 1%, less than 2%, less than 3%, less than 4%, less than 5%, or less than 10% by weight.
- the extract may be further processed to concentrate the type-A polymers to the desired or necessary concentration.
- a liquid extract is optionally passed over a column to provide a concentrated eluant with the target concentration of type-A polymers.
- Cinnamon bark may be used in the form of raw bark, sliced, or minced bark, or pulverized bark for the preparation of the therapeutic materials, and pulverized cinnamon bark is used in particular instances.
- an extract is prepared according to the foregoing procedures using a water extraction solvent.
- the concentration of the sample is approximately (e.g. within error) 5.17 mg/ml. It is also very important to note that the concentrations of the polymers change with the temperature and extraction time.
- other natural compounds may be used as an active ingredient.
- garlic acid is a trihydroxybenzoic acid, a type of phenolic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants.
- Rutin is a flavonoid, and is one of the polyphenolics compounds found in vegetables, fruits, herbs, leaves, seeds and several medicinal plants. Rutin is a bioflavonoid and antioxidant.
- Quercetin protects cell DNA, is anti-inflammatory, a natural histamine blocker, and has the ability to “steal” iron from cancer cells, which can stop their growth.
- Olive leaf extract includes the phytochemical known as oleuropein. Curcumin has powerful antioxidant and anti-inflammatory properties.
- the rosemary extract may be obtained from various resources. Rosemary, or Rosmarinus officinalis , is a woody bush native to the Mediterranean region. Extracts of rosemary may be made from Rosmarinus spp. and preferably from the leaves and young flowering tops of fresh rosemary ( Rosmarinus officinalis L. and its cultivars). Rosemary extraction may be performed by harvesting the leaves of a rosemary plant and reducing them in size such as by chopping to improve solvent penetration. A typical particle size is optionally 0.5-5.0 mm, or any value or range therebetween. In some embodiments, the leaf is chopped into a powder type substance with a particle size of less than 0.5 mm.
- the chopped plant material combined with a suitable extraction solvent such as water or a low molecular weight alcohol such as ethanol.
- the plant material is combined with the solvent for an extraction time of 18 to 36 hours.
- the extraction temperature is optionally the range 10° C. to 45° C.
- the resulting extract liquid is separated from the solid material and filtered, optionally with a sterile filter.
- the resulting extract is poured onto nonstick tray and allowed to dry at 80-90° C. Vacuum-spray dry equipment is optionally used for the drying procedure.
- the resulting dry extract powder is weighed. An extraction ratio is calculated as w/20 ⁇ 100% with “w” as the weight (g) of the dry extract powder.
- the sample and water ratio, heat time, volume of water in the second extraction may vary depending on the amount of the raw material used for extraction.
- composition administered can be in pharmaceutical compositions in the form of solid, semi-solid or liquid dosage forms, such as, for example, tablets, suppositories, pills, capsules, powders, liquids, oil based forms, or suspensions, and may be provided in unit dosages suitable for a single administration.
- Time release preparations are specifically contemplated as effective dosage formulations.
- the compositions will include an effective amount of the selected substrate in combination with a pharmaceutically acceptable carrier and, in addition, may include other medicinal agents, pharmaceutical agents, carriers, or diluents.
- conventional nontoxic solid carriers may include, for example, pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, sodium saccharine, talc, cellulose, glucose, sucrose and magnesium carbonate.
- Liquid pharmaceutically administrable compositions may, for example, be prepared by dissolving or dispersing an active agent with optimal pharmaceutical adjuvants in an excipient, such as water, saline, aqueous dextrose, glycerol, or ethanol, to form a solution or suspension.
- the pharmaceutical composition may contain minor amounts of nontoxic auxiliary substances such as wetting or emulsifying agents, pH buffering agents, for example, sodium acetate or triethanolamine oleate.
- wetting or emulsifying agents such as wetting or emulsifying agents, pH buffering agents, for example, sodium acetate or triethanolamine oleate.
- pH buffering agents for example, sodium acetate or triethanolamine oleate.
- fine powders or granules may contain diluting, dispersing, or surface active agents.
- the fine powders or granules may be presented in water or in syrup, in capsules or sachets in the dry state, or in a non-aqueous solution or suspension.
- Suspending agents may also be included in tablets, which may include binders and lubricants in a suspension. Flavoring, preserving, suspending, thickening, or emulsifying agents may be also included to modify the taste and texture of the composition.
- the tablets and granules provided for oral administration may further be coated for ease of digestion.
- the composition containing the active Type-A polymers may be combined with one or more supplementary active agents.
- a supplementary active agent optionally functions synergistically with a Type-A polymer.
- Supplementary active agents illustratively include vitamins (such as vitamin A, vitamin B, vitamin C, vitamin D, vitamin E or vitamin K), antioxidants (such as acai, wolfberry, alpha lipoic acid, astazanthin, or fucoxanthin), or any combination of the above.
- composition including Type-A polymers is optionally in the form of a food additive.
- examples include foods in a liquid, semi-liquid, solid, paste, or jelly form.
- compositions may be metabolized in the subject to yield a therapeutically effective amount of compound species, namely polyphenols such as a Type-A polyphenols as discussed in detail above, cinnamon oligomer, cinnamon catechin or epicatechin, cinnamon chalcone, and cinnamon MHCP.
- each dose of the cinnamon extract supplement is selected so as to deliver into the individual Type-A polymers in the amount of 0.1 milligrams (mg) to 150 mg of Type-A polymer per serving or any value or range therebetween, optionally 1-30 mg, and optionally 3-10 mg.
- the composition is taken orally between one and three times daily.
- routes of administration may be utilized.
- the compositions may be utilized in the form of derivatives.
- the composition may be bonded, chemically or physically, to other chemical species and moieties such as synthetic polymers, liposomes, small organic molecules, chitin, chitosan, other biopolymers and the like.
- synthetic polymers such as synthetic polymers, liposomes, small organic molecules, chitin, chitosan, other biopolymers and the like.
- a subject is administered a composition in a dosage so that each dose of the compositions is selected to deliver into the Type-A polymers in the amount of 0.1 milligrams (mg) to 150 mg of Type-A Polymer per serving or any value or range therebetween, optionally 1-30 mg, optionally 3-10 mg. It is further contemplated that variable dosing regiments are operative in the processes. While in some instances, a single dose treatment may be effective in producing therapeutic or other desired effects, in other instances a treatment period in the range of, for example, six weeks to three or six months or more may be utilized.
- composition may be administered orally, parentally, or intravenously by intramuscular, intraperitoneally, by transdermal injection, or by contact with a cell or tissue such as by immersion or other form of contact.
- injectable or oral dosage forms may be prepared in conventional forms, either liquid solutions or suspensions, solid forms suitable for solution or prior to administration, or as suspension in liquid prior to administration or as emulsions. Additionally, the dosage forms may be an oil-based form.
- the dose of the composition may vary depending on the age, weight, general condition of the subject. For example, dosage in the range of 1-1,000 mg or equivalent of at least 0.5% Type-A polymers by dry weight per day may be an effective range.
- the active agent may be present at 0.01%-100% of the dry weight of the composition.
- an active agent may comprise 0.5%-50% of the dry weight of the composition.
- a composition to a subject will inhibit expression of a PD-L1 gene or protein in a subject (e.g., in a cell) relative to control or baseline.
- a PD-L1 gene expression (such as CD274) is decreased as measured by the level of PD-L1 mRNA (such as CD274 mRNA) relative to a control such as the absence of composition.
- PD-L1 gene expression is inhibited (e.g., decreased) by a value of 1% to 300% or more, or any value or range therebetween.
- PD-L1 gene expression is decreased by 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 125%, 150%, 200%, 250%, 300%, or more.
- the level of target of PD-1 gene expression may be enhanced (e.g., increased) in the subject (e.g., the cell) relative to control or baseline.
- expression of the gene encoding PD-1 (PDCD1) is enhanced by a value of 1% to 300% or more, or any value or range therebetween.
- expression of the gene encoding PD-1 is enhanced by 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 125%, 150%, 200%, 250%, 300%, or more relative to control.
- mRNA is detected and optionally quantified by real-time polymerase chain reaction (qRT-PCR as used herein).
- qRT-PCR is optionally coupled to prior synthesis of cDNA from total cellular RNA such as using Superscript II RT which is a reverse transcriptase enzyme produced by Invitrogen, Corp., Carlsbad, Calif.
- Superscript II RT is a reverse transcriptase enzyme produced by Invitrogen, Corp., Carlsbad, Calif.
- Illustrative protocols for measuring gene expression can be found in Crujeiras A B, et al., Eur J Clin Invest, 2008; 38(9):672-8, as well as in other sources known in the art.
- a PD-L1 protein in a subject is optionally inhibited (i.e. decreased) by administration of a composition to a subject.
- a composition e.g., a cell
- expression of the PD-L1 protein is inhibited (e.g., in a cell) relative to a control or baseline.
- PD-L1 protein expression is inhibited by a value of 1% to 300% or more, or any value or range therebetween.
- PD-L1 protein expression is inhibited by 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 125%, 150%, 200%, 250%, 300%, or more.
- Expression of a PD-1 protein in a subject may be enhanced (i.e., increased) by administration of the composition to the subject.
- expression of the PD-1 protein is enhanced relative to a control or baseline.
- PD-1 protein expression may be enhanced by a value of 1% to 300% or more, or any value or range therebetween.
- PD-1 protein expression is enhanced by 1%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 125%, 150%, 200%, 250%, 300%, or more.
- Detecting and optionally quantifying PD-L1 protein or PD-1 protein expression is achieved by many methods known in the art.
- PD-L1 protein or PD-1 protein expression is detected and optionally quantified by enzyme linked immunosorbent assay (ELISA), mass spectrometry, western blot, gel electrophoresis optionally coupled with staining such as by Coomassie brilliant blue or silver stain, or by target specific stains, flow cytometry, immunoprecipitation, or by other method known in the art.
- an ELISA is used to detect and optionally quantify PD-L1 protein or PD-1 expression.
- ELISA kits for PD-L1 or PD-1 are available from sources known in the art.
- Antibodies directed to PD-L1 or PD-1 proteins suitable for use in ELISA are available from sources known in the art, including Santa Cruz Biotechnology, Santa Cruz, Calif.
- any dietary supplement or any extract of cinnamon described herein or their equivalents are optionally used in a process to treat dysfunctions of the PD-1/PD-L1 system in a subject (e.g., in a cell of a subject), including dysregulated PD-L1 levels and particularly high PD-L1 levels, dysregulated PD-1 levels and particularly low PD-1 levels, or combinations thereof, as well as symptoms in a subject caused by such dysfunctions of the PD-1/PD-L1 system in a subject (e.g., in a cell of a subject).
- the dietary supplement or any extract of cinnamon described herein or their equivalents are optionally used in a process to treat a tumor with reduced or even without cardiac side effects.
- a process of treating dysfunctions of the PD-1/PD-L1 pathway in a subject including dysregulated PD-L1 levels and particularly high PD-L1 levels, dysregulated PD-1 levels and particularly low PD-1 levels, and combinations thereof, is also provided.
- Such processes illustratively include administering to a subject a therapeutically effective amount of a composition including one or more Type-A polymers.
- a therapeutically effective amount is defined as that capable of decreasing the expression of a PD-L1 protein or a gene encoding a PD-L1 protein and/or increasing the expression of a PD-1 protein or a gene encoding a PD-1 protein in a subject (e.g., in a cell) relative to a control.
- Processes of treating dysfunctions of the PD-1/PD-L1 pathway in a cell including dysregulated PD-L1 levels and particularly high PD-L1 levels, dysregulated PD-1 levels and particularly low PD-1 levels, and combinations thereof, illustratively include administering to a subject a dietary supplement composition including Type-A polymers in a dosage so that each dose of the composition will deliver into the individual Type-A polymers in the amount of 0.1 milligrams (mg) to 150 mg of Type-A Polymer per serving or any value or range therebetween, such as 1-30 mg, or 3-10 mg.
- mg milligrams
- a process of treating symptoms implicated by dysfunctions of the PD-1/PD-L1 pathway (such as dysregulated PD-L1 levels and particularly high PD-L1 levels and/or dysregulated PD-1 levels and particularly low PD-1 levels, and combinations thereof) in a cell, including symptoms of cancer of a subject is also provided.
- Such processes illustratively include administering to a subject a therapeutically effective amount of Type-A polymers.
- a process of treating symptoms implicated by dysfunctions of the PD-1/PD-L1 pathway (such as dysregulated PD-L1 levels and particularly high PD-L1 levels and dysregulated PD-1 levels and particularly low PD-1 levels) in a cell, including symptoms of cardiovascular events in a subject is also provided.
- Such processes illustratively include administering to a subject a therapeutically effective amount of Type-A polymers to ameliorate, prevent, or modulate cardiac events in the subject.
- administration to a subject optionally reduces or eliminates events of cardiomyopathy, optionally heart failure optionally due to autoimmune dilated cardiomyopathy, relative to controls or other PD-L1 specific therapeutics.
- Processes of treating symptoms implicated by dysfunctions the PD-1/PD-L1 pathway (such as dysregulated PD-L1 levels and particularly high PD-L1 levels, dysregulated PD-1 levels and particularly low PD-1 levels, or combinations thereof) in a subject, including symptoms of cancer, viral infections, and autoimmune diseases such as autoimmune dilated cardiomyopathy, lupus-like syndrome, autoimmune encephalomyelitis, systemic lupus erythematosus, graft-versus-host disease, type I diabetes mellitus, and rheumatoid arthritis, illustratively include administering to a subject a composition including Type-A polymers in a dosage so that each dose of the composition will deliver into the individual Type-A polymers in the amount of 0.1 milligrams (mg) to 150 mg of Type-A Polymer per serving or any value or range therebetween, optionally 1-30 mg, optionally 3-10 mg.
- mg milligrams
- variable dosing regiments are operative in the methods. While in some instances, a single dose treatment may be effective in producing therapeutic effects, in other instances a treatment period in the range of, for example, six weeks to three or six months or more may be utilized.
- the composition may be administered orally, parentally, or intravenously by intramuscular, intraperitoneal, by transdermal injection, or otherwise by contact with a subject.
- injectables or oral forms may be prepared in conventional forms, either liquid solutions or suspensions, solid forms suitable for solution or prior to administration, or as suspension in liquid prior to administration or as emulsions.
- the dose of the composition may vary depending on the age, weight, general condition of the subject. For example, dosage in the range of 1-1,000 mg of at least 0.5% Type-A polymers by dry weight per day may be an effective range.
- the Type-A polymers may also comprise 0.01%-100% of the dry weight of the composition.
- a dietary supplement composition may comprise 0.5%-50% of the dry weight of the composition.
- THP-1 cells Human monocytic THP-1 cells were purchased from ATCC, Manassas, Va. and were maintained in RPMI culture medium supplemented with 10% heat inactivated fetal bovine serum, 10 mM Hepes, 0.1 mM MEM non-essential amino acids, 1 mM sodium pyruvate, and 100 nM penicillin/streptomycin in an atmosphere containing 5% CO 2 and 95% air at 37° C.
- THP-1 monocytes were differentiated in macrophages by 48 hour incubation with phorbol 12-myristate 13-acetate (PMA, Sigma, P8139) in RPMI media at a concentration of 10 ng/mL.
- PMA phorbol 12-myristate 13-acetate
- Cells were incubated with or without the treatment compounds at dosages indicated below at 37° C. for 24 hours.
- the cells were incubated in fresh F-12 K medium supplemented with 10 ⁇ g/mL LPS and the type-A polymers at a concentration (from 3% extract) of 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 25 ⁇ g/ml, or 50 ⁇ g/ml for 24 h at 37° C.
- the cells were incubated in fresh F-12 K medium supplemented with 10 ⁇ g/mL LPS and cinnamtannin D-1 at a concentration 2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml or 25 ⁇ g/ml for 24 h at 37° C.
- Cells were rinsed with ice-cold PBS and fixed with 4% paraformaldehyde for 10 min at room temperature, followed by permeabilization with 0.3% Triton x-100 for 10 min. After being washed with PBS three times, cells were incubated for 1 h in PBS containing 10% normal goat serum blocking solution. The cells were subjected to immunofluorescence staining with the specific antibodies (human macrophage-like THP-1 cells analyzed for PD-1 (Santa Cruz Biotech)) overnight at 4° C. The cells were then washed with cold PBS three times for 3 min each, and incubated with Alexa-labeled secondary antibodies (Invitrogen) at room temperature for 1 h.
- specific antibodies human macrophage-like THP-1 cells analyzed for PD-1 (Santa Cruz Biotech)
- the cells were examined by fluorescence microscopy (a Nikon TE2000-S microscope, Nikon, Tokyo, Japan). For cell counts, five to ten random fields with approximately similar density of cells in each field were selected for analysis in each plate. Fluorescence intensities (with pixel values exceeding five times the standard deviation of the background) from these images were semi-quantitatively analyzed by densitometry (ImageJ software, NIH Image).
- the Type-A polymer composition (from 3% extract) produced significantly enhanced expression of PDCD-1 relative to control in human macrophage-like THP-1 cells at all concentrations tested.
- the data demonstrates that doubly linked procyanidin type-A polymers significantly enhance expression of PDCD-1 in cells.
- the Type-A polymer composition significantly improved LPS-induced PDCD-1 down expression at all concentrations tested.
- the data demonstrates that doubly linked procyanidin type-A polymers significantly increase expression of PDCD-1 in cells.
- Cinnulin PF resulted in a percent increase of PDCD-1 expression of 13% increase at 5 ⁇ g/ml, 29% increase at 10 ⁇ g/ml, 67% increase at 25 ⁇ g/ml, and 58% increase at 50 ⁇ g/ml of Cinnulin PF.
- the cinnamtannin B-1 significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 20 ⁇ g/ml).
- cinnamtannin B-1 resulted in a percent increase of PDCD-1 expression of 21% increase at 2.5 ⁇ g/ml, 42% increase at 5 ⁇ g/ml, 83% increase at 10 ⁇ g/ml, and 62% increase at 20 ⁇ g/ml of cinnamtannin B-1.
- the cinnamtannin D-1 significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (2.5 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 20 ⁇ g/ml).
- cinnamtannin D-1 resulted in a percent increase of PDCD-1 expression of 18% increase at 2.5 ⁇ g/ml, 45% increase at 5 ⁇ g/ml, 87% increase at 10 ⁇ g/ml, and 71% increase at 20 ⁇ g/ml of cinnamtannin B-1.
- cinnamtannin D-1 significantly improved LPS-induced PD-1 down-regulation at all concentrations tested. As compared to controls, cinnamtannin D-1 resulted in a percent inhibition of LPS-induced PDCD-1 down expression of 42% inhibition at 2.5 ⁇ g/ml, 98% inhibition at 5 ⁇ g/ml, 81% inhibition at 10 ⁇ g/ml, and 48% inhibition at 25 ⁇ g/ml of cinnamtannin D-1.
- cinnamtannins In addition to cinnamtannins, various other natural compounds were tested to determine if they enhanced PD-1 expression. Compounds included olive leaf extract, quercetin, garlic acid, rutin, CellBerry® (black chokeberry extract from Aronia , commercially available from IN Ingredients Inc. Columbia, Tenn., USA), rosemary extract, and curcumin extract.
- the garlic acid significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml). As compared to controls, garlic acid resulted in a percent increase of PDCD-1 expression of 47% increase at 10 ⁇ g/ml, 71% increase at 20 ⁇ g/ml, and 52% increase at 50 ⁇ g/ml of garlic acid.
- the rutin significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml). As compared to controls, rutin resulted in a percent increase of PDCD-1 expression of 17% increase at 10 ⁇ g/ml, 48% increase at 20 ⁇ g/ml, and 43% increase at 50 ⁇ g/ml of rutin.
- the quercetin significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml). As compared to controls, quercetin resulted in a percent increase of PDCD-1 expression of 33% increase at 10 ⁇ g/ml, 78% increase at 20 ⁇ g/ml, and 57% increase at 50 ⁇ g/ml of quercetin.
- the olive leaf extract significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml).
- olive leaf extract resulted in a percent increase of PDCD-1 expression of 28% increase at 10 ⁇ g/ml, 67% increase at 50 ⁇ g/ml, and 79% increase at 100 ⁇ g/ml of olive leaf extract.
- the rosemary extract significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml).
- rosemary extract resulted in a percent increase of PDCD-1 expression of 35% increase at 10 ⁇ g/ml, 53% increase at 50 ⁇ g/ml, and 89% increase at 100 ⁇ g/ml of rosemary extract.
- the CellBerry® significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (10 ⁇ g/ml, 20 ⁇ g/ml, or 100 ⁇ g/ml). As compared to controls, CellBerry® resulted in a percent increase of PDCD-1 expression of 23% increase at 10 ⁇ g/ml, 35% increase at 20 ⁇ g/ml, and 48% increase at 100 ⁇ g/ml of CellBerry®.
- the curcumin extract significantly enhanced PDCD-1 expression in human macrophage-like THP-1 cells at all concentrations tested (5 ⁇ g/ml, 10 ⁇ g/ml, or 50 ⁇ g/ml).
- curcumin extract resulted in a percent increase of PDCD-1 expression of 21% increase at 5 ⁇ g/ml, 45% increase at 10 ⁇ g/ml, and 93% increase at 50 ⁇ g/ml of curcumin extract.
- rat C6 glioma cells and human macrophage-like THP-1 cells were used to determine the effects of active agents.
- cinnamtannin B1 and cinnamtannin D1 are obtained from Planta Analytica (New Milford, Conn.).
- a water extract of cinnamon with at least 3% by weight type-A polymers was obtained from IN Ingredients sold as CINNULIN PF.
- Each dried material was solvated in DMSO and stored at ⁇ 20° C. until use.
- the antibodies (anti-PD-L1) were all obtained from Santa Cruz Biotech. All other reagents used were of the highest grade available in commercial products.
- C6 glioma cells (CCL-107) were purchased from American Type Culture Collection (ATCC; Manassas, Va.). Cell cultures were grown in F-12 K medium (Gibco/Invitrogen) supplemented with 10% horse serum and 2% fetal bovine serum and maintained in a humidified atmosphere containing 5% CO 2 and 95% air at 37° C. Cultures were grown to 85% confluency in 75 mm flasks, and cells were subcultured by trypsinization of subconfluent cultures using 0.05% trypsin with EDTA. C6 glioma cells were seeded at a density of 0.5 ⁇ 10 6 cells per 35 mm dish, and cultured for two days. Cells were grown to confluence during the experimental period.
- the cells were incubated in fresh F-12 K medium supplemented with 10 ⁇ g/mL LPS or incubated in fresh F-12 K medium supplemented with 10 ⁇ g/mL LPS and cinnamtannin D1 at a concentration 10 ⁇ g/ml or 50 ⁇ g/ml (5 ⁇ g/ml and 25 ⁇ g/ml were not tested) for 24 h at 37° C.
- the cells were incubated in fresh FK-12 medium supplemented with 10 ng/mL TNF- ⁇ and cinnamtannin D1 at a concentration 10 ⁇ g/ml, 20 ⁇ g/ml or 50 ⁇ g/ml (5 ⁇ g/ml was not tested) for 24 h at 37° C.
- THP-1 monocytes are differentiated in macrophages by 24 hour incubation with 150 nM phorbol 12-myristate 13-acetate (PMA, Sigma, P8139). Two studies were performed: 1) no other treatment of the cells; and 2) treatment with LPS (10 ⁇ g/mL).
- the cells were incubated in fresh RPMI medium supplemented with the noted concentrations of extract of 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, or 25 ⁇ g/ml for 72 h at 37° C.
- the cells were incubated in fresh RPMI medium supplemented with 10 ⁇ g/mL of LPS and a concentration of active of 0 ⁇ g/ml, 5 ⁇ g/ml, 10 ⁇ g/ml, 20 ⁇ g/ml, or 50 ⁇ g/ml for 24 h at 37° C.
- Cells were rinsed with ice-cold PBS and fixed with 4% paraformaldehyde for 10 min at room temperature, followed by permeabilization with 0.3% Triton x-100 for 10 min. After being washed with PBS three times, cells were incubated for 1 h in PBS containing 10% normal goat serum blocking solution. The cells were subjected to immunofluorescence staining with the specific antibodies (Rat C6 glioma cells studied for PD-L1 (Santa Cruz Biotech); human macrophage-like THP-1 cells analyzed for PD-1 (Santa Cruz Biotech)) overnight at 4° C.
- the cells were then washed with cold PBS three times for 3 min each, and incubated with Alexa-labeled secondary antibodies (Invitrogen) at room temperature for 1 h.
- the cells were examined by fluorescence microscopy (a Nikon TE2000-S microscope, Nikon, Tokyo, Japan). For cell counts, five to ten random fields with approximately similar density of cells in each field were selected for analysis in each plate. Fluorescence intensities (with pixel values exceeding five times the standard deviation of the background) from these images were semi-quantitatively analyzed by densitometry (ImageJ software, NIH Image).
- the cinnamtannin D1 significantly inhibited PD-L1 expression in rat C6 glioma cells at all concentrations tested.
- cinnamtannin D1 resulted in a percent inhibition of PD-L1 expression of 39.9 percent inhibition at 5 ⁇ g/ml of cinnamtannin D1, 66.8 percent inhibition at 10 ⁇ g/ml of cinnamtannin D1, 58.1 percent inhibition at 25 ⁇ g/ml of cinnamtannin D1, and 43.6 percent inhibition at 50 ⁇ g/ml of cinnamtannin D1.
- the cinnamtannin B1 significantly inhibited PD-L1 expression in rat C6 glioma cells at all concentrations tested. As compared to controls, cinnamtannin B1 resulted in a percent inhibition of PD-L1 expression of 35.7 percent inhibition at 5 ⁇ g/ml of cinnamtannin B1, 60.8 percent inhibition at 10 ⁇ g/ml cinnamtannin B1, 54.9 percent inhibition at 25 ⁇ g/ml of cinnamtannin B1, and 41.9 percent inhibition at 50 ⁇ g/ml of cinnamtannin B1.
- the cinnamtannin D1 significantly inhibited TNF- ⁇ -induced overexpression of PD-L1 at all concentrations tested. As compared to controls, cinnamtannin D1 resulted in a percent inhibition of TNF- ⁇ -induced overexpression of PD-L1 of 32.0 percent inhibition at 10 ⁇ g/ml of cinnamtannin D1, 42.2 percent inhibition at 20 ⁇ g/ml of cinnamtannin D1, and 43.9 percent inhibition at 50 ⁇ g/ml of cinnamtannin D1.
- the cinnamtannin D1 significantly inhibited LPS-induced overexpression of PD-L1 at all concentrations tested. As compared to controls, cinnamtannin D1 resulted in a percent inhibition of LPS-induced overexpression of PD-L1 of 48.9 percent inhibition at 10 ⁇ g/ml of cinnamtannin D1, and 53.0 percent inhibition at 50 ⁇ g/ml of cinnamtannin D1.
- the Type-A polymer composition (from 3% extract) produced significantly inhibited expression of PD-L1 relative to control in rat C6 glioma cells at all concentrations tested (5 ⁇ g/ml, 10 ⁇ g/ml, 50 ⁇ g/ml, or 100 ⁇ g/ml) showing inhibition of expression of 10.4%, 21.7%, 58.4%, and 41.7%, respectively.
- the Type-A polymer composition produced significantly inhibited LPS-induced overexpression of PD-L1 using both 10 ⁇ g/ml and 10 ⁇ g/ml concentrations (5 ⁇ g/ml and 20 ⁇ g/ml was not tested).
- Type-A polymer composition produced significantly inhibited TNF- ⁇ -induced overexpression of PD-L1 using 10 ⁇ g/ml, 20 ⁇ g/ml, and 50 ⁇ g/ml concentrations (5 ⁇ g/ml was not tested).
- the data demonstrates that doubly linked procyanidin type-A polymers significantly decrease expression of PD-L1 in cells.
- Patents and publications mentioned in the specification are indicative of the levels of those skilled in the art to which the invention pertains. These patents and publications are incorporated herein by reference to the same extent as if each individual application or publication was specifically and individually incorporated herein by reference for the entirety of their teaching.
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Abstract
Description
(Anderson et al., J. Agric. Food Chem., 2004; 52:65-70.) Thus, in certain embodiments, Type-A polymers can include A-type singly or doubly linked procyanidin dimers of catechins and/or epicatechins, A-type singly or doubly linked procyanidin trimers of catechins and/or epicatechins, A-Type singly or doubly linked procyanidin tetramers of catechins and/or epicatechins, and/or a mixture of A-Type singly or doubly linked procyanidin oligomers of catechins and/or epicatechins. In other embodiments, Type-A polymers can include A-Type doubly linked procyanidin dimers of catechins and/or epicatechins, A-type doubly linked procyanidin trimers of catechins and/or epicatechins, A-Type doubly linked procyanidin tetramers of catechins and/or epicatechins, and/or a mixture of A-Type doubly linked procyanidin oligomers of catechins and/or epicatechins. In some embodiments, the Type-A polymers can include cinnamtannin D-1 and/or cinnamtannin B-1. In some embodiments, A-Type singly linked procyanidin oligomers of the catechins and/or epicatechins are excluded from a composition.
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